package cn.edu.xmu.wnw.dao.impl;

import java.util.List;

import org.hibernate.LockMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import cn.edu.xmu.wnw.dao.UserDAO;
import cn.edu.xmu.wnw.pojo.User;

/**
 * A data access object (DAO) providing persistence and search support for User
 * entities. Transaction control of the save(), update() and delete() operations
 * can directly support Spring container-managed transactions or they can be
 * augmented to handle user-managed Spring transactions. Each of these methods
 * provides additional information for how to configure it for the desired type
 * of transaction control.
 * 
 * @see cn.edu.xmu.wnw.pojo.User
 * @author MyEclipse Persistence Tools
 */

public class UserDAOImpl extends HibernateDaoSupport implements UserDAO
{
	private static final Logger log = LoggerFactory
			.getLogger(UserDAOImpl.class);
	// property constants
	public static final String USERNAME = "username";
	public static final String PASSWORD = "password";
	public static final String NICK_NAME = "nickName";
	public static final String EMAIL = "email";
	public static final String QQ = "qq";
	public static final String DESCRIPTION = "description";
	public static final String STATE = "state";
	public static final String HIT = "hit";

	public void initDao()
	{
		// do nothing
	}

	public void save(User transientInstance)
	{
		log.debug("saving User instance");
		try
		{
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		}
		catch (RuntimeException re)
		{
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(User persistentInstance)
	{
		log.debug("deleting User instance");
		try
		{
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		}
		catch (RuntimeException re)
		{
			log.error("delete failed", re);
			throw re;
		}
	}

	public User findById(java.lang.Integer id)
	{
		log.debug("getting User instance with id: " + id);
		try
		{
			User instance = (User) getHibernateTemplate().get(
					"cn.edu.xmu.wnw.pojo.User", id);
			return instance;
		}
		catch (RuntimeException re)
		{
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(User instance)
	{
		log.debug("finding User instance by example");
		try
		{
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		}
		catch (RuntimeException re)
		{
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value)
	{
		log.debug("finding User instance with property: " + propertyName
				+ ", value: " + value);
		try
		{
			String queryString = "from User as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		}
		catch (RuntimeException re)
		{
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByUsername(Object username)
	{
		return findByProperty(USERNAME, username);
	}

	public List findByPassword(Object password)
	{
		return findByProperty(PASSWORD, password);
	}

	public List findByNickName(Object nickName)
	{
		return findByProperty(NICK_NAME, nickName);
	}

	public List findByEmail(Object email)
	{
		return findByProperty(EMAIL, email);
	}

	public List findByQq(Object qq)
	{
		return findByProperty(QQ, qq);
	}

	public List findByDescription(Object description)
	{
		return findByProperty(DESCRIPTION, description);
	}

	public List findByState(Object state)
	{
		return findByProperty(STATE, state);
	}

	public List findByHit(Object hit)
	{
		return findByProperty(HIT, hit);
	}

	public List findAll()
	{
		log.debug("finding all User instances");
		try
		{
			String queryString = "from User";
			return getHibernateTemplate().find(queryString);
		}
		catch (RuntimeException re)
		{
			log.error("find all failed", re);
			throw re;
		}
	}

	public User merge(User detachedInstance)
	{
		log.debug("merging User instance");
		try
		{
			User result = (User) getHibernateTemplate().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		}
		catch (RuntimeException re)
		{
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(User instance)
	{
		log.debug("attaching dirty User instance");
		try
		{
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		}
		catch (RuntimeException re)
		{
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(User instance)
	{
		log.debug("attaching clean User instance");
		try
		{
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		}
		catch (RuntimeException re)
		{
			log.error("attach failed", re);
			throw re;
		}
	}

	public UserDAOImpl getFromApplicationContext(ApplicationContext ctx)
	{
		return (UserDAOImpl) ctx.getBean("UserDAO");
	}
}